If their business grows at a rate higher than interest, there's no reason why the bank wouldn't be happy to add the interest to the loan. If their business is growing at a rate lower than interest, it's a poor investment and they ought to sell it off and put their money somewhere else. Such as lending it out.
This is just delaying the payment. OK, let's assume they do it for 1,2,3 years and that the bank is happy not to receive any payment in those 3 years. Now they've accrued interest-on-interest and the more time passes the more they'd have to pay back. So my question remains - one day they'd have to pay it back and on that day they'd have to sell assets and pay 36% tax.
If you can't find a buyer, then close it down and sell the assets. The point being that if your business isn't capable of raising capital equivalent to 1% of its taxable value, then this generally isn't a reasonable business.
The valuation for tax purposes of unlisted companies is the taxable valuation of the company assets excluding goodwill [1]. In practice this usually means the taxable value of e.g. a startup tends to be quite low.